Fix nextcloud from address

flux2/apps/nextcloud/release.yaml

@@ -24,7 +24,7 @@ spec:
         password: "${nextcloud_password}"
         mail:
           enabled: ${outgoing_mail_enabled}
-          fromAddress: "${outgoing_mail_from_address}"
+          fromAddress: "${outgoing_mail_from_local_part}"
           domain: "${outgoing_mail_domain}"
           smtp:
             host: "${outgoing_mail_smtp_host}"

install/.env.example → install/.flux.env.example

@@ -6,6 +6,7 @@ admin_email=admin@example.org
 # Outgoing mail: even though we disable it, we need values for them, because
 # Kustomize still wants to substitute them.
 outgoing_mail_enabled=false
+outgoing_mail_from_local_part=admin
 outgoing_mail_from_address=admin@example.org
 outgoing_mail_domain=oas.example.org
 outgoing_mail_smtp_password=CHANGEME